### Lesson 2 - Powers, roots and standard form

Powers and roots

Index laws

Negative indices and reciprocals

Fractional indices

Surds

Standard form

### Lesson 4 - Decimals and rounding

Decimals and place value

Terminating and recurring decimals

Calculating with decimals

Rounding

Upper and lower bounds

### Lesson 6 - Ratio and proportion

Ratio

Dividing in a given ratio

Direct proportion

Inverse proportion

Proportionality to powers

Graphs of proportional relationships